US4028351A - Method for the preparation of derivatives of spiro (4,5)-decane and derivatives thus obtained - Google Patents
Method for the preparation of derivatives of spiro (4,5)-decane and derivatives thus obtained Download PDFInfo
- Publication number
- US4028351A US4028351A US05/549,061 US54906175A US4028351A US 4028351 A US4028351 A US 4028351A US 54906175 A US54906175 A US 54906175A US 4028351 A US4028351 A US 4028351A
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- United States
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- formula
- reaction
- spiro
- ethyl
- Prior art date
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- Expired - Lifetime
Links
- CTDQAGUNKPRERK-UHFFFAOYSA-N spirodecane Chemical class C1CCCC21CCCCC2 CTDQAGUNKPRERK-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims description 28
- 238000002360 preparation method Methods 0.000 title claims description 6
- -1 N-substituted-4-piperidone Chemical class 0.000 claims abstract description 23
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims abstract description 16
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011877 solvent mixture Substances 0.000 claims abstract description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 63
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 38
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 20
- 238000007792 addition Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000011701 zinc Substances 0.000 claims description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 9
- 239000003960 organic solvent Substances 0.000 claims description 9
- 239000011541 reaction mixture Substances 0.000 claims description 9
- 229910052725 zinc Inorganic materials 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 239000003208 petroleum Substances 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- 229910052740 iodine Inorganic materials 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 125000002524 organometallic group Chemical group 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 2
- 229910052794 bromium Inorganic materials 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 125000000490 cinnamyl group Chemical group C(C=CC1=CC=CC=C1)* 0.000 claims description 2
- 125000005982 diphenylmethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])(*)C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 claims description 2
- 150000002170 ethers Chemical class 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- 230000007062 hydrolysis Effects 0.000 claims description 2
- 238000006460 hydrolysis reaction Methods 0.000 claims description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 2
- 239000012429 reaction media Substances 0.000 claims description 2
- 230000003472 neutralizing effect Effects 0.000 claims 1
- 230000001376 precipitating effect Effects 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 abstract description 33
- 238000006680 Reformatsky reaction Methods 0.000 abstract description 12
- 239000002904 solvent Substances 0.000 abstract description 10
- 230000017105 transposition Effects 0.000 abstract description 5
- 150000003751 zinc Chemical class 0.000 abstract description 5
- 229910052736 halogen Inorganic materials 0.000 abstract description 4
- 230000004048 modification Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 18
- PQJJJMRNHATNKG-UHFFFAOYSA-N ethyl bromoacetate Chemical compound CCOC(=O)CBr PQJJJMRNHATNKG-UHFFFAOYSA-N 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 9
- 239000012458 free base Substances 0.000 description 9
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 8
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000010992 reflux Methods 0.000 description 5
- 238000004809 thin layer chromatography Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 230000002152 alkylating effect Effects 0.000 description 4
- 125000003118 aryl group Chemical group 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 4
- 235000010755 mineral Nutrition 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- NQRYJNQNLNOLGT-UHFFFAOYSA-N tetrahydropyridine hydrochloride Natural products C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 4
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 4
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- WPUJEWVVTKLMQI-UHFFFAOYSA-N benzene;ethoxyethane Chemical compound CCOCC.C1=CC=CC=C1 WPUJEWVVTKLMQI-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N ethyl acetate Substances CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000011630 iodine Substances 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- YDJXNYNKKXZBMP-UHFFFAOYSA-N n-phenethyl-4-piperidinone Chemical class C1CC(=O)CCN1CCC1=CC=CC=C1 YDJXNYNKKXZBMP-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- XUWHAWMETYGRKB-UHFFFAOYSA-N piperidin-2-one Chemical compound O=C1CCCCN1 XUWHAWMETYGRKB-UHFFFAOYSA-N 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 2
- NTYJJOPFIAHURM-UHFFFAOYSA-N Histamine Chemical compound NCCC1=CN=CN1 NTYJJOPFIAHURM-UHFFFAOYSA-N 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 2
- 241000700159 Rattus Species 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 239000000908 ammonium hydroxide Substances 0.000 description 2
- 230000000202 analgesic effect Effects 0.000 description 2
- 230000003110 anti-inflammatory effect Effects 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 150000001728 carbonyl compounds Chemical class 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 230000008034 disappearance Effects 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000003480 eluent Substances 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 150000002367 halogens Chemical group 0.000 description 2
- 125000004356 hydroxy functional group Chemical group O* 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 description 2
- 239000012286 potassium permanganate Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 229960001866 silicon dioxide Drugs 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 125000001424 substituent group Chemical group 0.000 description 2
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 description 1
- SJZKULRDWHPHGG-UHFFFAOYSA-N 1-benzylpiperidin-4-one Chemical compound C1CC(=O)CCN1CC1=CC=CC=C1 SJZKULRDWHPHGG-UHFFFAOYSA-N 0.000 description 1
- JJFOBACUIRKUPN-UHFFFAOYSA-N 2-bromoethoxybenzene Chemical compound BrCCOC1=CC=CC=C1 JJFOBACUIRKUPN-UHFFFAOYSA-N 0.000 description 1
- YFVIYUCTLBXCMJ-UHFFFAOYSA-N 5-(2-chloroethyl)-1,3-benzodioxole Chemical compound ClCCC1=CC=C2OCOC2=C1 YFVIYUCTLBXCMJ-UHFFFAOYSA-N 0.000 description 1
- FVNFBBAOMBJTST-UHFFFAOYSA-N 8-(2-phenylethyl)-1-oxa-3,8-diazaspiro[4.5]decan-2-one Chemical compound O1C(=O)NCC11CCN(CCC=2C=CC=CC=2)CC1 FVNFBBAOMBJTST-UHFFFAOYSA-N 0.000 description 1
- AHAXAQQBPDDAAR-UHFFFAOYSA-N 8-(3-phenylprop-2-enyl)-1-oxa-3,8-diazaspiro[4.5]decan-2-one Chemical compound O=C1OC2(CN1)CCN(CC2)CC=CC1=CC=CC=C1 AHAXAQQBPDDAAR-UHFFFAOYSA-N 0.000 description 1
- XMLLMZWAYIWEFP-UHFFFAOYSA-N 8-[2-(4-fluorophenyl)ethyl]-1-oxa-3,8-diazaspiro[4.5]decan-2-one Chemical compound C1=CC(F)=CC=C1CCN1CCC2(OC(=O)NC2)CC1 XMLLMZWAYIWEFP-UHFFFAOYSA-N 0.000 description 1
- BQDOKYGIOCNNLC-UHFFFAOYSA-N 8-[2-[3-(trifluoromethyl)phenyl]ethyl]-1-oxa-3,8-diazaspiro[4.5]decan-2-one Chemical compound FC(F)(F)C1=CC=CC(CCN2CCC3(OC(=O)NC3)CC2)=C1 BQDOKYGIOCNNLC-UHFFFAOYSA-N 0.000 description 1
- IUIWIPRVGAAEOH-UHFFFAOYSA-N 8-benzyl-1-oxa-3,8-diazaspiro[4.5]decan-2-one Chemical compound O1C(=O)NCC11CCN(CC=2C=CC=CC=2)CC1 IUIWIPRVGAAEOH-UHFFFAOYSA-N 0.000 description 1
- 101100177155 Arabidopsis thaliana HAC1 gene Proteins 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 208000009079 Bronchial Spasm Diseases 0.000 description 1
- 208000014181 Bronchial disease Diseases 0.000 description 1
- 206010006482 Bronchospasm Diseases 0.000 description 1
- 241000700198 Cavia Species 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 206010011224 Cough Diseases 0.000 description 1
- 229910003556 H2 SO4 Inorganic materials 0.000 description 1
- 101100434170 Oryza sativa subsp. japonica ACR2.1 gene Proteins 0.000 description 1
- 101100434171 Oryza sativa subsp. japonica ACR2.2 gene Proteins 0.000 description 1
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- 241000700157 Rattus norvegicus Species 0.000 description 1
- 229910006124 SOCl2 Inorganic materials 0.000 description 1
- 101150108015 STR6 gene Proteins 0.000 description 1
- 101100386054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) CYS3 gene Proteins 0.000 description 1
- IWTYTFSSTWXZFU-QPJJXVBHSA-N [(e)-3-chloroprop-1-enyl]benzene Chemical compound ClC\C=C\C1=CC=CC=C1 IWTYTFSSTWXZFU-QPJJXVBHSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- PQLVXDKIJBQVDF-UHFFFAOYSA-N acetic acid;hydrate Chemical compound O.CC(O)=O PQLVXDKIJBQVDF-UHFFFAOYSA-N 0.000 description 1
- OIPILFWXSMYKGL-UHFFFAOYSA-N acetylcholine Chemical compound CC(=O)OCC[N+](C)(C)C OIPILFWXSMYKGL-UHFFFAOYSA-N 0.000 description 1
- 229960004373 acetylcholine Drugs 0.000 description 1
- 238000001632 acidimetric titration Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 125000005907 alkyl ester group Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000004791 alkyl magnesium halides Chemical class 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 150000001414 amino alcohols Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000005557 antagonist Substances 0.000 description 1
- 239000000730 antalgic agent Substances 0.000 description 1
- 230000001088 anti-asthma Effects 0.000 description 1
- 239000000924 antiasthmatic agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- OQROAIRCEOBYJA-UHFFFAOYSA-N bromodiphenylmethane Chemical compound C=1C=CC=CC=1C(Br)C1=CC=CC=C1 OQROAIRCEOBYJA-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000002327 cardiovascular agent Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000007806 chemical reaction intermediate Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000006471 dimerization reaction Methods 0.000 description 1
- 229960001484 edetic acid Drugs 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- BKTKLDMYHTUESO-UHFFFAOYSA-N ethyl 2-bromo-2-phenylacetate Chemical compound CCOC(=O)C(Br)C1=CC=CC=C1 BKTKLDMYHTUESO-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229960001340 histamine Drugs 0.000 description 1
- 239000012456 homogeneous solution Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000000144 pharmacologic effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000011369 resultant mixture Substances 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- QZAYGJVTTNCVMB-UHFFFAOYSA-N serotonin Chemical compound C1=C(O)C=C2C(CCN)=CNC2=C1 QZAYGJVTTNCVMB-UHFFFAOYSA-N 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 101150035983 str1 gene Proteins 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003204 tranquilizing agent Substances 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D498/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms
- C07D498/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
- C07D498/10—Spiro-condensed systems
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
- C07C201/06—Preparation of nitro compounds
- C07C201/12—Preparation of nitro compounds by reactions not involving the formation of nitro groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/30—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds
- C07C209/32—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups
- C07C209/36—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings in presence of hydrogen-containing gases and a catalyst
- C07C209/365—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings in presence of hydrogen-containing gases and a catalyst by reduction with preservation of halogen-atoms in compounds containing nitro groups and halogen atoms bound to the same carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C227/14—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof
- C07C227/18—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof by reactions involving amino or carboxyl groups, e.g. hydrolysis of esters or amides, by formation of halides, salts or esters
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F3/00—Compounds containing elements of Groups 2 or 12 of the Periodic Table
- C07F3/003—Compounds containing elements of Groups 2 or 12 of the Periodic Table without C-Metal linkages
Definitions
- This invention relates to a novel method for the synthesis of derivatives of spiro-(4,5)-decane having the general formula: ##STR1## wherein R is a beta-phenyl-ethyl, 3',4'-methylenedioxy-(beta-phenyl-ethyl), beta-(p-fluoro)-phenyl-ethyl, betaphenoxy-ethyl, cinnamyl, diphenyl-methyl, beta-(3'-trifluoromethyl)-phenyl-ethyl group, and R' is hydrogen or phenyl; and the compounds hereby obtained.
- R is a beta-phenyl-ethyl, 3',4'-methylenedioxy-(beta-phenyl-ethyl), beta-(p-fluoro)-phenyl-ethyl, betaphenoxy-ethyl, cinnamyl, diphenyl-methyl, beta-(3'-
- the yields are not high, especially during progress of the reduction of the cyanohydrin, and undesirable by-products are present in heavy amounts.
- alpha-halogen alkyl acetate having the formula: ##STR5## wherein X is a halogen selected among chlorine, bromine and iodine, and R' has the aforesaid meaning in the presence of activated elemental zinc, with a molar ratio between the reagents and the zinc of at least one mole of the compound (IV), one mole of the compound (V) and one mole of activated zinc, preferably in the ratio of one mole of the compound (IV), 2.5 moles of the halogen ester and 5 moles of activated zinc, to form a beta-hydroxy-ester product having the formula: ##STR6## wherein R and R' are as defined above; (2) reacting the beta hydroxy ester (VI), for 8 to 30 hours and at a temperature of 40°- 60° C., with excess hydrazine, in the molar ratio of ester to hydrazine from 1:1.5 to 1:100, preferably 1:10, to form the beta-hydroxy-ester product having
- Another object of the present invention resides in the compounds of formula (I) in which R and R' have the above stated meanings.
- Reformatsky reaction is normally intended to indicate a condensation reaction between a carbonyl compound and an ester of an alpha-halogen-aliphatic acid, in the presence of either zinc or magnesium, as described for instance by D. Shapiro in J. Org. Chem., 15, (1950), pp. 1027-1036.
- the compounds of formula (I) above could not be obtained, since the reaction scheme proposed by Shapiro, if applied to N-phenethyl-4-piperidones would mainly lead to derivatives alkylated at the piperidinic N atom.
- the N-substituted 4-piperidone (IV) is reacted with an alpha-halogen-alkyl acetate (V).
- an alpha-halogen-alkyl acetate V.
- the chloro-and the bromo- and iodo-derivatives can all be used.
- magnesium due to its high reactivity, requires a more close control of the reaction, since otherwise it could continue to react with the carboethoxy group of the obtained beta-hydroxy ester (VI).
- the metal can be used as metal powder, filings, shavings, thin metal wool and can be activated in the following ways:
- the method indicated at (2) is the one which is preferred for the present invention.
- reaction itself can be further improved by adding to the medium catalytic amounts of iodine or alkylmagnesium halides.
- An anhydrous mixture of benzene and ethyl ether is the solvent system which is suitable for the reaction.
- the conventional solvents e.g. diethyl ether, benzene, tetrahydrofuran, etc., which are normally used in the Reformatsky reaction, are not capable of a sufficient solvent action on the reaction intermediates, thus preventing the reaction from occurring plainly and the controls related to the single steps from being carried out.
- the decomposition of the final adduct and the isolation of the beta-hydroxy-ester are suitably carried out according to the present invention by dissolving the precipitate, after the analytical control, in a solvent mixture of acetic acid and water (in the volume ratio of 1:1 ).
- a solvent mixture of acetic acid and water in the volume ratio of 1:1 .
- the beta-hydroxy ester is subsequently converted into the beta-hydroxy-hydrazide by treatment with hydrazine either in the anhydrous form (1) or in the hydrated forms (2) (70-85% hydration).
- reaction is carried out by admixing the reactants in the presence (or not) of inert organic solvents such as benzene and subsequently completed either by heating the mixture at 40°-60° C. during 8- 15 hours, or by allowing the mixture to stand at room temperature during one to two weeks.
- inert organic solvents such as benzene
- reaction is carried out by admixing the reactants in the presence of inert organic solvents, such as benzene, and of alcoholic solvents, such as ethanol, so as to bring the reaction mixture always back to a homogeneous condition at high temperatures (40°- 60° C.).
- inert organic solvents such as benzene
- alcoholic solvents such as ethanol
- the Curtius transposition of the intermediate leads to the formation of the final spiro-(4,5)-decane.
- the transposition is carried out by the action of nitrous acid, which is properly generated in situ through the reaction of an alkali metal nitrite with a diluted mineral acid, on the beta-hydroxy hydrazide. It is necessary to work in an excess of nitrous acid, the ratio of the hydrazide to the nitrous acid being at least 1:1.6, 1: preferably 1:5 and over, and this excess is completely removed at the end by adding the appropriate amount of urea.
- the reaction is carried out by maintaining the aqueous acidic mixture under a blanket of organic solvent such as mixtures of petroleum ethers having a boiling point range of from 60° C. to 90° C., temperatures which define the corresponding optimum value at which the transposition can be properly controlled and completed.
- TLC thin layer chromatographies
- R F front ratios
- silica gel chromatographic plates which have been activated during one hour, at 120° C., using as the eluent a mixture of chloroform/benzene/ether/methanol in the ratios 6:2:6:1 and by detecting the spots by spraying with a solution of alkalized potassium permanganate (yellow-green spots on a dark red background), the latter being obtained by admixing equal volumes of a 2% aqueous potassium permanganate solution and of a 4% solution of sodium bicarbonate.
- a suitable flask equipped with a column reflux condenser, electromechanical stirrer, dropping funnel and gas intake pipe, is charged with 32 grs. (0.5 mole) of activated zinc, 100 mls. of anhydrous benzene-ether mixture (1:1 v/v) and two crystals of bisublimed iodine.
- reaction mixture is refluxed during two hours and then allowed to stand for one hour.
- the aforedescribed technique permits the several controls of the reaction to be effected with high precision and, therefore, to obtain high yields of pure product, which is not effected by undesired reaction by-products.
- the final reaction product is isolated by conventional filtering techniques and then dried under vacuum at 40°- 50° C.
- the solid reaction product having the formula ##STR10## is hydrolyzed in a mixture of acetic acid-water (1:1 v/v) under stirring at low temperature.
- the solution is neutralized at pH 7 by means of 20% w/v NH 4 OH, the temperature being maintained at 0° C.
- the solution is then extracted several times with 100 ml portions of benzene.
- the combined benzene extracts are dried over anhydrous K 2 CO 3 , filtered and concentrated up to a fixed residue.
- the test is simultaneously carried out in two test tubes.
- One of the two samples is allowed to stand 15 minutes at room temperature, whereas the second is kept on a water bath at about 75° C. undisturbed for 15 minutes.
- each of the two solutions is treated with 2 mls. of water, the whole is passed into a separatory funnel and the resultant aqueous phase is made alkaline by addition of ammonium hydroxide and repeatedly extracted with 2-3 ml. portions of benzene.
- the combined benzene solutions are thoroughly salted out, washed with water to neutrality, dried over K 2 CO 3 and concentrated in vacuo.
- the resultant samples have the following chromatogram:
- a 500 ml. flask equipped with a reflux stirrer is charged with 20 grs. (0.07 mole approx.) of N-phenethyl-4 -hydroxy-4-ethyl acetate piperidine dissolved in 20 mls. benzene.
- a strong excess of hydrazine hydrate (30 mls. of the 85% reagent-0.6 mole approx.) and the resultant mixture is heated to a temperature of about 50° 60° C.
- Ethyl alcohol is then added until obtaining a homogeneous solution in hot conditions.
- the mixture is maintained at 50° 60° C. during one hour and then is brought back to room temperature again, and allowed to stand for five days.
- the nitrous acid which is present is decomposed with urea (about 5 grs.), a reflux condenser is applied to the flask and heat is gently applied, while maintaining the stirring. Even at room temperature nitrogen evolution can be observed, an evolution which becomes vigorous at 50° 60° C. The reaction is exothermic and the refluxing of the petroleum ether layer is intended to absorb the built up heat. Once the nitrogen evolution has been terminated, the mixture is cooled, poured in a separatory funnel and the acidic aqueous phase is collected. The latter is made alkaline by addition of concentrated ammonium hydroxide, thoroughly salted out and extracted several times with benzene.
- the final molar yield of the steps A, B and C as a whole, is 41.6% of theory, referred to the starting piperidone-4.
- Example 2 the same process of Example 1 has been repeated, except that the starting N-substituted 4-piperidone was different.
- the starting 1-(3',4'-methylenedioxy-phenethyl)-piperidone-4 ##STR14## is prepared by alkylating piperidone-4 with 3,4-methylenedioxy-phenethyl chloride.
- the preparation of the beta-hydroxy-ester is carried out by reacting, according to the Reformatsky modified technique, the compound (IX) with ethyl bromo-acetate.
- the starting 1-(4'-fluorophenethyl)-piperidone-4 (X) ##STR16##
- the beta-hydroxy ester is prepared by reacting, according to the modified Reformatsky reaction, the compound (X) with ethyl bromoacetate.
- the starting 1-phenoxyethyl piperidone-4 (XI) ##STR18## is prepared by alkylating the piperidone-4 with phenoxyethyl bromide.
- the preparation of the beta-hydroxy ester is carried out through the reaction of the compound (XI) with ethyl bromoacetate, according to the modified Reformatsky technique.
- the modified Reformatsky reaction is carried out on the compound (XII) by means of ethyl bromoacetate, leading to the corresponding beta-hydroxy-ester.
- the starting 1-diphenylmethyl piperidone-4 (XIII) ##STR22## is prepared by alkylating piperidone-4 with diphenyl methyl bromide.
- the modified Reformatsky reaction is carried out on the compound (XIII) with ethyl bromoacetate.
- the mole yield of the compound (XXXIV) is 34% of theory, referred to the starting piperidone-4.
- the modified Reformatsky reaction on the compound (XIV) is effected with ethyl bromoacetate.
- the mole yield of the compound (XXXI) is 60% of theory, referred to the starting piperidone-4.
- the modified Reformatsky reaction is carried out by means of ethyl bromoacetate.
- the mole yield of the compound (XXX) is 80% of theory, referred to the starting piperidone.
- the modified Reformatsky reaction is effected by reacting the compound (XVI) with ethyl bromophenylacetate.
- the mole yield of the compound (XXXVII) is 31% of theory, referred to the starting piperidone.
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Abstract
Derivatives of spiro-(4,5)-decane, are prepared from an N-substituted-4-piperidone according to a modification of the Reformatsky reaction. The N-substituted-4-piperidone is reacted in an appropriate solvent or solvent mixture with an alpha halogen ester in the presence of activated zinc. The obtained beta-hydroxy ester is reacted with an excess of hydrazine, the resultant compound being a beta hydroxy hydrazide. The latter is subjected to a Curtius transposition with nitrous acid in excess.
Description
This application is a continuation in-part application of my copending application Ser. No. 445,634 filed on Feb. 25, 1974, which in turn is a Rule 60 continuation application of U.S. Ser. No. 286,752 filed on Sept. 6, 1972, both now abandoned.
This invention relates to a novel method for the synthesis of derivatives of spiro-(4,5)-decane having the general formula: ##STR1## wherein R is a beta-phenyl-ethyl, 3',4'-methylenedioxy-(beta-phenyl-ethyl), beta-(p-fluoro)-phenyl-ethyl, betaphenoxy-ethyl, cinnamyl, diphenyl-methyl, beta-(3'-trifluoromethyl)-phenyl-ethyl group, and R' is hydrogen or phenyl; and the compounds hereby obtained.
Compounds such as those listed above, in which however R'= H, or R' = an alkyl or an aryl grouping are already known in the art and more particularly in the pharmaceutical field, especially as anti-inflammatory, cough-preventing, antiasthmatic, antisecretive, cardiovascular, analgesic and tranquilizing agents.
In the British Pat. No. 1,100,281 in the name of Science Union and Cie., there are described both the compounds identified above with the formula (I) in which however, R'= H and also the methods for their preparation.
More particularly, according to the preferred method disclosed in the U.K. Patent an amino alcohol having the formula: ##STR2## in which R has the meaning defined above and obtained by cyaniding the corresponding N-alkyl-piperidone and subsequent reduction of the thusly obtained cyanohydrin, is reacted for cyclization with urea, phosgene or an alkyl ester of carbonic acid in the presence of an alcoholate.
In the case where the nature of the substituent R makes it difficult to prepare the corresponding N-alkyl-piperidones, it is necessary to debenzylate a compound obtained according to the preceding method by converting it into a compound having the formula: ##STR3## which is then caused to react with a halogenated compound R--X, wherein X is a halogen and R has the meaning specified above and is subjected to the limitation indicated at the beginning of this paragraph.
Both the above described methods are subjected to a few shortcomings and problems.
As a matter of fact, as indicated in the said U.K. Patent, the yields are not high, especially during progress of the reduction of the cyanohydrin, and undesirable by-products are present in heavy amounts.
In addition the problems and difficulties are well known which accompany the cyaniding reactions, mainly on account of the fact that highly toxic, highly volatile and difficultly removable substances are to be manipulated.
In addition, in the case of the compounds of the present invention, the introduction of substituents R' in the position shown in the formula (I) would involve, by using these prior art methods, considerable difficulties both in carrying out the reaction and in limiting and removing undesirable by-products.
There has now been found, and this is the subject matter of the present invention, a novel method for the synthesis of derivatives of spiro-(4,5)-decane having the above reported formula (I), starting from an N-substituted 4-piperidone having the formula: ##STR4## in which R' has the above stated meaning, which comprises the steps of: (1) reacting the N-substituted 4-piperidone, according to the modified Reformatsky method, in an anhydrous solvent mixture of benzene and ethyl ether and at a temperature comprised between 25° C. and 70° C., with an alpha-halogen alkyl acetate having the formula: ##STR5## wherein X is a halogen selected among chlorine, bromine and iodine, and R' has the aforesaid meaning in the presence of activated elemental zinc, with a molar ratio between the reagents and the zinc of at least one mole of the compound (IV), one mole of the compound (V) and one mole of activated zinc, preferably in the ratio of one mole of the compound (IV), 2.5 moles of the halogen ester and 5 moles of activated zinc, to form a beta-hydroxy-ester product having the formula: ##STR6## wherein R and R' are as defined above; (2) reacting the beta hydroxy ester (VI), for 8 to 30 hours and at a temperature of 40°- 60° C., with excess hydrazine, in the molar ratio of ester to hydrazine from 1:1.5 to 1:100, preferably 1:10, to form the corresponding beta-hydroxy-hydrazide: and (3) finally rearranging the beta-hydroxy-hydrazide (VII) according to the Curtius transposition reaction, by reacting it with excess nitrous acid, in the presence of a diluted mineral acid, at a temperature which ranges from room temperature to 60° C., the acidic aqueous mixture being maintained under a blanket of an organic solvent.
Another object of the present invention resides in the compounds of formula (I) in which R and R' have the above stated meanings.
The term "Reformatsky reaction" is normally intended to indicate a condensation reaction between a carbonyl compound and an ester of an alpha-halogen-aliphatic acid, in the presence of either zinc or magnesium, as described for instance by D. Shapiro in J. Org. Chem., 15, (1950), pp. 1027-1036. However the compounds of formula (I) above could not be obtained, since the reaction scheme proposed by Shapiro, if applied to N-phenethyl-4-piperidones would mainly lead to derivatives alkylated at the piperidinic N atom.
In Helvetica Chimic Acta, vol. XLI, V (1958), No. 130, pages 1185 and following, there is described a Reformatsky reaction on 1-benzyl-4-piperidone, performed with ethyl bromoacetate and in the presence of zinc, which produced (1-benzyl-4-hydroxy-4-piperidyl)-aceto-ethyl ester, the Reformatsky method having been modified in this case inasmuch as the reaction between zinc and ethyl-bromoacetate is caused to take place prior to adding the aminoketone; the resulting ester was then separated by distillation under reduced pressure.
However, the method of the example given above, which dates back to 1958, has not been considered for the compounds having the formula (I) and for the synthesis according to the present invention, and this is because the compounds of formula (I) of the present invention would be heavily degraded by vacuum distillation.
Considering now in detail the several stages of the method according to the present invention as defined above, the N-substituted 4-piperidone (IV) is reacted with an alpha-halogen-alkyl acetate (V). Among the possible compounds of the type R'--CH(X)--COOEt the chloro-and the bromo- and iodo-derivatives can all be used.
The most appropriate selection is a function of the form of zinc, the metal activation system, the solvents used for the reaction and the physical conditions under which the reaction is carried out. Sometimes Zn can be replaced by magnesium, the latter metal being used in a few conventional Reformatsky reactions.
As a matter of fact, magnesium, due to its high reactivity, requires a more close control of the reaction, since otherwise it could continue to react with the carboethoxy group of the obtained beta-hydroxy ester (VI).
The metal can be used as metal powder, filings, shavings, thin metal wool and can be activated in the following ways:
(1) Simple washing with anhydrous organic solvents (ether, benzene, petroleum ether, acetone, etc.) and drying in vacuo at a temperature between 50° C. and 120° C.;
(2) Treatment with diluted mineral acids, washing with prefectly neutral water, washing with acetone and subsequently with mixtures of anhydrous organic solvents and drying as in (1) above;
(3) Treatment with acetone and iodine which has been twice sublimed, at elevated temperatures (40°-50° C.), washing with perfectly anhydrous organic solvents and drying as in (1) above;
(4) Treatment with concentrated mineral acid, either singly or in admixture (sulphuric, hydrochloric, nitric, phosphoric, etc.), washing to neutrality with water, washing with acetone and subsequently with organic anhydrous solvents and finally drying as in (1).
Among these, the method indicated at (2) is the one which is preferred for the present invention.
The reaction itself can be further improved by adding to the medium catalytic amounts of iodine or alkylmagnesium halides.
An anhydrous mixture of benzene and ethyl ether is the solvent system which is suitable for the reaction.
The complete reaction can be carried out with high yields only by operating through several steps under carefully controlled conditions, namely:
(a) formation of the primary adduct ##STR7## wherein R' and X have the above defined meanings, between the activated zinc and the alpha-halogen alkyl ester in a anhydrous mixture of benzene and ethyl ether until the alpha-halogen alkyl ester is wholly absent from the reaction mixture, at a temperature of between 50° and 70° C.;
(b) formation of the final adduct ##STR8## between the primary adduct and the N-substituted 4-piperidone in the same reaction medium at a temperature between 0° C. and 20° C.;
(c) complete precipitation of the thus obtained organo-metallic adduct at a temperature of 0° C. and by subsequent additions of anhydrous ethyl ether, and then separation of the organo-metallic adduct through filtration, drying and analysis thereof;
(d) decomposition of the final adduct and isolation of the beta-hydroxy ester in form of an oily product tending to become solid at low temperature by means of a 50% v/v water solution of acetic acid.
In this sense the above said step is a modification of the conventional Reformatsky method. The later, if truly applied to the starting compounds of the present invention would mainly lead to the formation of undesired by-products, for instance compounds resulting from the alkylation at the piperidinic nitrogen atom and dimerization products of the carbonyl compound.
Moreover, the conventional solvents, e.g. diethyl ether, benzene, tetrahydrofuran, etc., which are normally used in the Reformatsky reaction, are not capable of a sufficient solvent action on the reaction intermediates, thus preventing the reaction from occurring plainly and the controls related to the single steps from being carried out.
The use of the mixture of benzene and ethyl ether permits the formation of the primary adduct and the further addition of the anhydrous ethyl ether permits the quantitative precipitation of the final adduct.
This obtention of a filterable precipitate is of the utmost importance since it leads to advantageous operating conditions and to improved yields.
Lastly, the decomposition of the final adduct and the isolation of the beta-hydroxy-ester are suitably carried out according to the present invention by dissolving the precipitate, after the analytical control, in a solvent mixture of acetic acid and water (in the volume ratio of 1:1 ). Thus, after neutralization of the resulting solution to pH 7, and extraction with an organic solvent, e.g. benzene, toluene etc., a pure beta-hydroxy-ester can be obtained, the purity of which is so high to render unnecessary any further purification steps, like distillation and so on.
The beta-hydroxy ester is subsequently converted into the beta-hydroxy-hydrazide by treatment with hydrazine either in the anhydrous form (1) or in the hydrated forms (2) (70-85% hydration).
(1) The reaction is carried out by admixing the reactants in the presence (or not) of inert organic solvents such as benzene and subsequently completed either by heating the mixture at 40°-60° C. during 8- 15 hours, or by allowing the mixture to stand at room temperature during one to two weeks.
(2) The reaction is carried out by admixing the reactants in the presence of inert organic solvents, such as benzene, and of alcoholic solvents, such as ethanol, so as to bring the reaction mixture always back to a homogeneous condition at high temperatures (40°- 60° C.). The conversion is completed at elevated temperatures (60°-80° C.) within 15 to 30 hours.
In both cases it is advisable to work with an excess of hydrazine over the stoichiometric values. The excess is intended to lie within the range from 1:1.5 to 1:100, preferably 1:10.
The Curtius transposition of the intermediate leads to the formation of the final spiro-(4,5)-decane. The transposition is carried out by the action of nitrous acid, which is properly generated in situ through the reaction of an alkali metal nitrite with a diluted mineral acid, on the beta-hydroxy hydrazide. It is necessary to work in an excess of nitrous acid, the ratio of the hydrazide to the nitrous acid being at least 1:1.6, 1: preferably 1:5 and over, and this excess is completely removed at the end by adding the appropriate amount of urea. The reaction is carried out by maintaining the aqueous acidic mixture under a blanket of organic solvent such as mixtures of petroleum ethers having a boiling point range of from 60° C. to 90° C., temperatures which define the corresponding optimum value at which the transposition can be properly controlled and completed.
The following example illustrates in detail the application of the method of synthesis according to the present invention to the preparation of 8-N-phenethyl-1-oxa-3,8-diaza-(4,5)-decane-2-one having the structural formula: ##STR9##
It is fitting to indicate that the IR spectra have been recorded on a Perkin-Elmer mod. 257 apparatus. The letters in brackets, as reported beside the wavelength values, refer to the intensity of the absorption peaks; (s)= strong; (m)= medium; (w)= weak; (b)= broadened.
The thin layer chromatographies (TLC) from which the values of the front ratios (RF) of the spots have been derived, have been carried out on silica gel chromatographic plates which have been activated during one hour, at 120° C., using as the eluent a mixture of chloroform/benzene/ether/methanol in the ratios 6:2:6:1 and by detecting the spots by spraying with a solution of alkalized potassium permanganate (yellow-green spots on a dark red background), the latter being obtained by admixing equal volumes of a 2% aqueous potassium permanganate solution and of a 4% solution of sodium bicarbonate.
A suitable flask, equipped with a column reflux condenser, electromechanical stirrer, dropping funnel and gas intake pipe, is charged with 32 grs. (0.5 mole) of activated zinc, 100 mls. of anhydrous benzene-ether mixture (1:1 v/v) and two crystals of bisublimed iodine.
At an internal temperature of 50° C., under stirring and under an inert gas blanket, the dropwise addition of a solution of 20 mls. (0.25 mole) of ethyl bromoacetate in 50 mls. of anhydrous ether-benzene mixture (1:1 v/v) is started.
After about two thirds of the charge is added, the reaction is started, the temperature begins to increase and the rate of dropping is adjusted so as to maintain the solvent under slight reflux.
At the end of the addition, the reaction mixture is refluxed during two hours and then allowed to stand for one hour.
Before starting the second step, it is necessary to check the complete disappearance of the free bromo-acetic ester from the solution. To this end, a sample of the bromogeneous solution is tested by thin layer chromatography, using as the absorbent silicagel merck G 254 and as the eluent a mixture of n-hexane/chloroform in the ratio 10:2; under these conditions the ethyl bromoacetate is detected as a fluoroescent spot having Rf = about 0.2.
At the same time, it also advisable to carry out a spectrophotometric control, by diluting a drop of the solution into 10 to 15 mls. of a mixture of chloroform and methanol in the ratio 1:1. The ethyl bromoacetate, under the said conditions, shows in a 1 cm. cell a strong absorption at about 238 nm.
When the absence of free bromo-ester in the reaction mixture is ascertained, the temperature is brought to about 15° C. and the dropwise addition, under stirring, of a solution of 20 grs. (0.1 mole) of N-phenethyl-4-piperidone in 30 mls. of anhydrous benzene-ether (1:1) mixture is started. During the addition it is advisable to add to the reaction mixture further amounts of 10-20 mls of ether, in order to promote the separation of the final product, in form of a solid well dispersed the solvent. At the end of the said addition, the suspension is further vigorously stirred at 0° C. during 2 hours.
The aforedescribed technique permits the several controls of the reaction to be effected with high precision and, therefore, to obtain high yields of pure product, which is not effected by undesired reaction by-products.
The end of the reaction is detected by thin layer chromatography by checking both the disappearance of the spot indicating the starting N-phenethyl-4-piperidone and the appearence of the more polar spot having Rf=0.3.
The final reaction product is isolated by conventional filtering techniques and then dried under vacuum at 40°- 50° C.
Before carrying out the hydrolysis of the reaction product, the following controls are effected:
Dosing of the zinc with ethylenediaminetetra-acetic acid (EDTA)
Acidimetric titration
Chromatography.
The solid reaction product, having the formula ##STR10## is hydrolyzed in a mixture of acetic acid-water (1:1 v/v) under stirring at low temperature.
Once the product is completely dissolved, the solution is neutralized at pH 7 by means of 20% w/v NH4 OH, the temperature being maintained at 0° C. The solution is then extracted several times with 100 ml portions of benzene.
The combined benzene extracts are dried over anhydrous K2 CO3, filtered and concentrated up to a fixed residue.
The residue (20 grs. namely 70% of the theoretical mole yield) shows the following properties:
Tlc: rf = 0.3 approx.
Ir (liquid film). Peaks at:
______________________________________ 3200-3700 cm.sup..sup.-1 (b) ν-OH 1730 cm.sup..sup.-1 (s) νC = 0 of --O--CO--R 700 cm.sup..sup.-1 (m)with aromatic 750 cm.sup..sup.-1 (m)substitution NMR (Cd Cl.sub.3): --triplet centered at 1.5 δ(ppm) = ##STR11## --quadruplet centered at 4.4 δ(ppm) = ##STR12## ______________________________________
Treatment with thionyl chloride, in order to assess the presence of the beta-hydroxy ester group.
The test is simultaneously carried out in two test tubes. To a solution of 0.5 ml of beta-hydroxyester in 1 ml. benzene there is added 1 ml. of SOCl2. One of the two samples is allowed to stand 15 minutes at room temperature, whereas the second is kept on a water bath at about 75° C. undisturbed for 15 minutes. Once the prescribed time has elapsed, each of the two solutions is treated with 2 mls. of water, the whole is passed into a separatory funnel and the resultant aqueous phase is made alkaline by addition of ammonium hydroxide and repeatedly extracted with 2-3 ml. portions of benzene. The combined benzene solutions are thoroughly salted out, washed with water to neutrality, dried over K2 CO3 and concentrated in vacuo. The resultant samples have the following chromatogram:
(a) Room temperature test. Spots with Rf = 0.3; 0.5; 0.6
(b) test at 75° C. Spots with Rf = 0.5; 0.6;
A 500 ml. flask equipped with a reflux stirrer is charged with 20 grs. (0.07 mole approx.) of N-phenethyl-4 -hydroxy-4-ethyl acetate piperidine dissolved in 20 mls. benzene. To the solution there is added a strong excess of hydrazine hydrate (30 mls. of the 85% reagent-0.6 mole approx.) and the resultant mixture is heated to a temperature of about 50° 60° C. Ethyl alcohol is then added until obtaining a homogeneous solution in hot conditions. The mixture is maintained at 50° 60° C. during one hour and then is brought back to room temperature again, and allowed to stand for five days. On completion of the reaction, the excess hydrazine is removed under vacuum in a desiccator over H2 SO4 and subsequently the solution is evaporated to dryness still in vacuo, a brown solid product being obtained with a yield of 75- 85% of theory on a weight basis. The beta hydroxy hydrazide, as crystallized from diethyl ether has the following specifications:
Melting point: 110° C. (not corrected)
TLC: Rf f = O approx.
IR (in nujol) Bands at:
______________________________________ 3200 cm.sup..sup.-1 (b) ν--OH 3380 cm.sup..sup.-1 (m) ν--NH of --CONHNH.sub.2 3300 cm.sup..sup.-1 (m) ν--NH of --CONHNH.sub.2 1650 cm.sup..sup.-1 (s) ν--C = 0 of --CONHNH.sub.2 750 cm.sup..sup.-1 (m) monosubstituted aromatic 700 cm.sup..sup.-1 (m) ______________________________________
In a 1,000 ml. flask there are dissolved 25 grs. of beta hydroxy hydrazide in 150 mls. 2N HCl and the solution is blanketed with a layer of petroleum ether (b.p. 65°-90° C.). In the reaction vessel, which has been previously cooled at 5°- 10° C., an aqueous solution of an excess of sodium nitrite (about 10 grs. of the salt in 100 mls. water) is added dropwise.
On completion of the addition, the nitrous acid which is present is decomposed with urea (about 5 grs.), a reflux condenser is applied to the flask and heat is gently applied, while maintaining the stirring. Even at room temperature nitrogen evolution can be observed, an evolution which becomes vigorous at 50° 60° C. The reaction is exothermic and the refluxing of the petroleum ether layer is intended to absorb the built up heat. Once the nitrogen evolution has been terminated, the mixture is cooled, poured in a separatory funnel and the acidic aqueous phase is collected. The latter is made alkaline by addition of concentrated ammonium hydroxide, thoroughly salted out and extracted several times with benzene. The benzene extract is washed to neutrality, dried over K2 CO3 and the solvent is evaporated under vacuum. The obtained spiro decane (mole yield: 80% of theory) crystallizes from benzene/petroleum ether and has the following specifications:
Melting point 154°-156° C.
Tlc: rf = 0.1
Uv in methanol λmax =258 nm
Ir (in nujol) Bands at:
______________________________________ 3280 cm.sup..sup.-1 (m) ν--NH 1730 cm.sup..sup.-1 (s) ν--C = 0 of --O--CO--NH-- 750 cm.sup..sup.-1 (m) monosubstituted aromatic 700 cm.sup..sup.-1 (m) ______________________________________
The final molar yield of the steps A, B and C as a whole, is 41.6% of theory, referred to the starting piperidone-4.
In the following Examples 2 to 9, the same process of Example 1 has been repeated, except that the starting N-substituted 4-piperidone was different.
1-oxa-2-oxo-3,8-diaza-8 (3',4'-methylenedioxy-phenethyl)-spiro-(4,5)-decane- ##STR13## m.p.: 183° C.
The starting 1-(3',4'-methylenedioxy-phenethyl)-piperidone-4 ##STR14## is prepared by alkylating piperidone-4 with 3,4-methylenedioxy-phenethyl chloride. The preparation of the beta-hydroxy-ester is carried out by reacting, according to the Reformatsky modified technique, the compound (IX) with ethyl bromo-acetate.
The mole yield of the compound (XXXVI), as free base, is 24% of theory, with respect to the starting piperidone-4 (IX).
1-oxa-2-oxo-3,8-diaza-8(4'-fluorophenethyl)-spiro(4,5)-decane ##STR15## Melting point: (a) free base= 152° C.; (b) hydrochloride= 247° C.
The starting 1-(4'-fluorophenethyl)-piperidone-4 (X) ##STR16## The beta-hydroxy ester is prepared by reacting, according to the modified Reformatsky reaction, the compound (X) with ethyl bromoacetate.
The molar yield of the compound (XXXV), as free base, is 46% of the theory, referred to the starting piperidone-4.
1-oxa-2-oxo-3,8-diaza-8-phenoxyethyl-spiro(4,5)-decane ##STR17## Melting point: (a) free base= 138° C.; (b) hydrochloride= 226° C.
The starting 1-phenoxyethyl piperidone-4 (XI) ##STR18## is prepared by alkylating the piperidone-4 with phenoxyethyl bromide.
The preparation of the beta-hydroxy ester is carried out through the reaction of the compound (XI) with ethyl bromoacetate, according to the modified Reformatsky technique.
The mole yield, as free base, of the compound (XXXIII) is 55% of theory, referred to the starting piperidone-4 (XI).
1-oxa-2-oxo-3,8-diaza-8-cinnamyl-spiro(4,5)-decane ##STR19## Melting point of the free base: 176° C. The starting 1-cinnamylpiperidone-4 (XII) ##STR20## is prepared by alkylating piperidone-4 with cinnamyl chloride.
The modified Reformatsky reaction is carried out on the compound (XII) by means of ethyl bromoacetate, leading to the corresponding beta-hydroxy-ester.
The mole yield of the compound (XXXII), as free base, is 31% of theory, referred to the starting piperidone.
1-oxa-2-oxa-3,8-diaza-8-diphenylmethyl-spiro(4,5)-decane ##STR21## Melting point of the free base: 200° C.
The starting 1-diphenylmethyl piperidone-4 (XIII) ##STR22## is prepared by alkylating piperidone-4 with diphenyl methyl bromide.
The modified Reformatsky reaction is carried out on the compound (XIII) with ethyl bromoacetate.
The mole yield of the compound (XXXIV) is 34% of theory, referred to the starting piperidone-4.
1-oxa-2-oxo-3,8-diaza-8(3'-trifluoromethyl-phenethyl)-spiro(4,5)-decane ##STR23## Melting point of the hydrochloride: 232° C.
The starting 1-(3'-trifluoromethyl-phenethyl) piperidone-4 (XIV) ##STR24## is prepared from n-trifluoromethyl benzaldehyde as shown in Example 2.
The modified Reformatsky reaction on the compound (XIV) is effected with ethyl bromoacetate. The mole yield of the compound (XXXI) is 60% of theory, referred to the starting piperidone-4.
1-oxa-2-oxo-3,8-diaza-8-benzyl-spiro(4,5)-decane ##STR25## Melting point of the free base= 178° - 179° C. The starting 1-benzyl piperidone-4 is an easily available chemical product.
The modified Reformatsky reaction is carried out by means of ethyl bromoacetate.
The mole yield of the compound (XXX) is 80% of theory, referred to the starting piperidone.
1-oxa-2-oxo-3,8-diaza-8-phenethyl-1-4-phenyl-spiro(4,5)-decane ##STR26## Melting point: 211° C.
The starting 1-phenethyl-piperidone-4(XV) ##STR27## is prepared according to the following scheme: ##STR28##
The modified Reformatsky reaction is effected by reacting the compound (XVI) with ethyl bromophenylacetate. The mole yield of the compound (XXXVII) is 31% of theory, referred to the starting piperidone.
In the preceding Examples the modified Reformatsky reaction was carried out with ethyl bromo-acetate, but this is not to be taken as a limitation, since the choice is only dependent on the fact that a five-membered ring is to be formed.
In the following table 1 some results of pharmacological tests are reported, confirming the stated interesting properties of the claimed compounds.
TABLE 1 __________________________________________________________________________ BRONCHO-SPASM 50% approx.inhibiting HEATED KAOLIN dose PLATE INDUCED mg/kg i.v. TEST (mouse) OEDEMA (rat) ##STR29## LD.sub.50 (rat) mg/kg i.p. Histamine Sero- tonine Acetyl- choline i.p. mg/kg % increase of thresh- old value Total dose mg/kg per os (48 hours) Volume variation __________________________________________________________________________ % R= ##STR30## 235 (196-282) 0.2 >2.5 >2.5 40 80 310 39.5 ##STR31## R= ##STR32## 282 (256-312) 0.2 0.5 2 10 41.7 70 19.4 ##STR33## R= ##STR34## 344 (323-365) >0.5 >0.5 >0.5 100 49 440 26.3 ##STR35## R= ##STR36## 346 (325-368) >0.5 >0.5 >0.5 100 119 440 4.6 ##STR37## R= ##STR38## 344 (286-412) 0.5 >0.5 >0.5 50 45.6 310 10 ##STR39## R= ##STR40## 319 (330-339) >0.5 >0.5 >0.5 100 93 340 9.4 ##STR41## R= ##STR42## 230 (198-266) 0.5 0.2 2 25 63.4 190 16.1 ##STR43## __________________________________________________________________________ In the preceding Table 1: a) the data of analgesic activity are expressed as the variation % of the stimulation threshold in the mouse; b) the data of anti-inflammatory activity are expressed as the volume variation of the kaolin induced oedema in the Wistar rat; c) the experiments on the antagonist activity against the bronochospasm were carried out on guinea pigs, according to the technique taught by Konzett and Roessler (Arch. Exper. Pathol. Pharm., 71, (1940), 195).
Claims (14)
1. A method for the preparation of a spiro-[ 4,5]- decane derivative having the formula: ##STR44## in which R is selected from the group consisting of beta-phenylethyl, 3',4'-methylenedioxy (beta-phenyl-ethyl)-, beta-(p-fluoro)-phenyl-ethyl; beta-phenoxy-ethyl, cinnamyl, diphenyl-methyl, and beta-(3'-trifluoromethyl)-phenyl- ethyl, and R' is hydrogen or phenyl, which comprises the steps of:
1. reacting, at a temperature of between 50° and 60° C, an alpha-halogen alkyl acetate, having the formula ##STR45## wherein R' is as defined above and X is Cl, Br or I, in the presence of activated elemental zinc to form a primary adduct having the formula ##STR46## wherein R' and X have the above defined meanings, in an anhydrous solvent mixture of benzene and ethyl ether, until the alpha-halogen alkyl ester is wholly absent from the reaction mixture;
2.
2. adding at least one mole of an N-substituted-4-piperidone of the formula ##STR47## where R is as defined above per mole of primary adduct in the reaction mixture from step (1) at a temperature between 0° and 20° C. to form a final adduct, having the formula ##STR48##
3. completely precipitating the final adduct at a temperature of 0° C by stepwise addition of anhydrous ethyl ether, and separating the final organo-metallic adduct by filtering and drying;
4. decomposing the solid final adduct with water to form an oily beta-hydroxy ester product of the formula ##STR49##
wherein R and R' are as defined above; 5. neutralizing the reaction mixture from step (4 ) to pH 7; extracting the beta-hydroxy ester product with an organic solvent and isolating the beta-hydroxy ester;
6. reacting said beta-hydroxy ester product with excess hydrazine for 8 to 30 hours at a temperature of 40°-60° C, in the molar ratio of ester to hydrazine of 1:1.5 to 1:100, to form the corresponding beta-hydroxy-hydrazide, having the formula ##STR50## and (7) rearranging said beta-hydroxy hydrazide, according to the Curtius transportion reaction, by reacting it with excess nitrous acid, in the presence of a diluted mineral acid at a temperature from room temperature to 60° C, to form the spiro [4,5]-decane derivative of formula (I).
. The method of claim 1, wherein the mole ratio of N-substituted piperidone to alpha-halogen alkyl acetate to activated elemental zinc in
step (1) is 1 : 2.5 : 5. 3. The method of claim 1, wherein the reaction of step (2) is carried out until, on analyzing the reaction mixture, the absence of the N-substituted 4-piperidone is checked.
4. The method of claim 1, wherein the decomposition of the final adduct in step (4) takes place by hydrolysis carried out with a mixture of acetic acid and water in the volume ratio of 1:1.
5. The method of claim 1, wherein the reaction medium of step (1) is an anhydrous mixture of benzene and ethyl ether in the volume ratio of 1 : 1.
6. The method of claim 1, wherein the ratio of the betahydroxy ester product to hydrzine in step (6) is 1 to 10, and the ratio of hydrazide to nitrous acid in step (7) is 1 : 1.6.
7. The method of claim 1, wherein step (7) is carried out under a blanket of petroleum ethers having a boiling point between 60° C and 90° C.
8. 1-oxo-2-oxa-3,8-diaza-8-phenoxyethyl-spiro-decane.
9. 1-oxa-2-oxo-3,8-diaza-8-cinnamyl-spiro decane.
10. 1-oxa-2-oxo-3,8-diaza-8-diphenylmethyl-spiro-decane.
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US05/549,061 US4028351A (en) | 1971-09-07 | 1975-02-11 | Method for the preparation of derivatives of spiro (4,5)-decane and derivatives thus obtained |
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CH1314171A CH536314A (en) | 1971-09-07 | 1971-09-07 | Process for the synthesis of oxa-1, oxo-2, diaza-3,8, phenethyl-8, spiro (4,5) -decane |
CH13141/71 | 1971-09-07 | ||
CH2053/74 | 1974-02-12 | ||
CH205374A CH601304A5 (en) | 1974-02-12 | 1974-02-12 | |
US44563474A | 1974-02-25 | 1974-02-25 | |
US05/549,061 US4028351A (en) | 1971-09-07 | 1975-02-11 | Method for the preparation of derivatives of spiro (4,5)-decane and derivatives thus obtained |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US4107139A (en) * | 1977-08-09 | 1978-08-15 | Hoechst Aktiengesellschaft | 1-Oxa-4,8-diazaspiro[4,5]decanes and polymers stabilized against UV light with these compounds |
US4353900A (en) * | 1981-10-19 | 1982-10-12 | Syntex (U.S.A.) Inc. | 9-(Arylalkyl or aroylalkyl)-1-oxa-4,9-diazaspiro(5.5)undecan-3-ones |
DE3342325A1 (en) * | 1982-11-23 | 1984-05-24 | Fábrica Española de Productos Químicos y Farmacéuticos, S.A.(FAES), Lejona-Lamiaco, Vizcaya | 3- (1,2,3,6-TETRAHYDRO-1,3-DIMETHYL-2,6-DIOXOPURIN-7-ACETYL) -8- (2-PHENYLETHYL) -1-OXA-3,8-DIAZASPIRO- (4.5 ) DECAN-2-ON, METHOD FOR THE PRODUCTION THEREOF AND MEDICINAL PRODUCT CONTAINING THIS |
US4824836A (en) * | 1987-05-22 | 1989-04-25 | Adir Et Compagnie | Spiro (4,5) decone compounds |
CN1099419C (en) * | 1994-08-24 | 2003-01-22 | 阿斯特拉公司 | Azabicyclic compound |
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US3655673A (en) * | 1969-03-25 | 1972-04-11 | Logeais Labor Jacques | Process for the preparation of oxazolidinone derivatives |
US3721675A (en) * | 1969-03-25 | 1973-03-20 | Logeais J Lab | Oxazolidin-2-one derivatives |
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US3655673A (en) * | 1969-03-25 | 1972-04-11 | Logeais Labor Jacques | Process for the preparation of oxazolidinone derivatives |
US3721675A (en) * | 1969-03-25 | 1973-03-20 | Logeais J Lab | Oxazolidin-2-one derivatives |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4107139A (en) * | 1977-08-09 | 1978-08-15 | Hoechst Aktiengesellschaft | 1-Oxa-4,8-diazaspiro[4,5]decanes and polymers stabilized against UV light with these compounds |
US4353900A (en) * | 1981-10-19 | 1982-10-12 | Syntex (U.S.A.) Inc. | 9-(Arylalkyl or aroylalkyl)-1-oxa-4,9-diazaspiro(5.5)undecan-3-ones |
DE3342325A1 (en) * | 1982-11-23 | 1984-05-24 | Fábrica Española de Productos Químicos y Farmacéuticos, S.A.(FAES), Lejona-Lamiaco, Vizcaya | 3- (1,2,3,6-TETRAHYDRO-1,3-DIMETHYL-2,6-DIOXOPURIN-7-ACETYL) -8- (2-PHENYLETHYL) -1-OXA-3,8-DIAZASPIRO- (4.5 ) DECAN-2-ON, METHOD FOR THE PRODUCTION THEREOF AND MEDICINAL PRODUCT CONTAINING THIS |
US4824836A (en) * | 1987-05-22 | 1989-04-25 | Adir Et Compagnie | Spiro (4,5) decone compounds |
CN1099419C (en) * | 1994-08-24 | 2003-01-22 | 阿斯特拉公司 | Azabicyclic compound |
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